Multi-Tenant Database: Custom Engine Architecture Options

Multi-tenant SaaS needs a clear strategy for data isolation, performance, and cost. A custom engine can implement the tenant model you need without the overhead of a one-size-fits-all DB.

• •Shared schema, tenant key – One logical DB, every row has a tenant_id. Simple; isolation is logical. Good for many small tenants.
• •Schema per tenant – Separate schema (or DB) per tenant. Strong isolation; more ops and cost. Good for large or regulated tenants.
• •Hybrid – Hot path (e.g. session, cache) in a custom engine with tenant key; analytical or admin in a relational DB per tenant or shared.

• •Tenant-aware indexing – Indexes and partitioning by tenant so one tenant’s load doesn’t affect others.
• •Quotas and throttling – Per-tenant limits enforced in the engine.
• •Isolation – Optional process or instance per tenant for strict isolation without managing many full DBs.

When you have thousands of tenants or a few large ones with strict SLAs, and off-the-shelf multi-tenant patterns (e.g. Citus, schema-per-tenant on Postgres) don’t meet latency or cost goals. At Hendoi we build custom database engines (VeloxDB) for USA, Canada, and Bengaluru. Contact us for a free quote.